Even as romance blossoms for Harry (now in his sixth year at Hogwarts), as well as for Ron (Rupert Grint), and Hermione (Emma Watson), a decisive showdown looms as Lord Voldemort tightens his grip on both the Muggle and wizarding worlds. While Harry finds a mysterious old book labeled the "property of the Half-Blood Prince," Dumbledore (Michael Gambon) focuses on preparing Harry for the approaching final battle and recruits his old friend and colleague Horace Slughorn (Jim Broadbent), whom he believes holds crucial information. This sixth installment in the series, from 2009, earned an Oscar nomination for cinematography and a Grammy nod for Nicholas Hooper's soundtrack.